Radical and migratory insertion reaction mechanisms in Schiff base zirconium alkyls

…, G Clarkson, ML Hammond, BS Kimberley…

Index: Knight, Paul D.; Clarkson, Guy; Hammond, Max L.; Kimberley, Brian S.; Scott, Peter Journal of Organometallic Chemistry, 2005 , vol. 690, # 23 p. 5125 - 5144

Full Text: HTML

Citation Number: 40

Abstract

Four salicylaldimine derivatives H2L4–7 of 2, 2′-diamino-6, 6′-dimethylbiphenyl, where the CN bond is sterically protected by substituents on the phenol ring, form alkyls of zirconium, cis-α-[ZrL4–7 (CH2Ph) 2]. Rather than decomposing via the established pathway of 1, 2-migratory insertion of an alkyl group to imine, they undergo a radical mechanism. This is evidenced by the large number of products observed, kinetic and thermodynamic data ( ...